Commit c6fba7b7 authored by Peter Chen's avatar Peter Chen

Doc: usb: ci-hdrc-usb2: add ahb-burst-config for binding doc

It is used to change ahb burst configuration for platforms, it is
vendor specific.
Signed-off-by: default avatarPeter Chen <peter.chen@freescale.com>
parent 0ef877a4
...@@ -32,6 +32,11 @@ Optional properties: ...@@ -32,6 +32,11 @@ Optional properties:
- external-vbus-divider: (FSL only) enables off-chip resistor divider for Vbus - external-vbus-divider: (FSL only) enables off-chip resistor divider for Vbus
- itc-setting: interrupt threshold control register control, the setting - itc-setting: interrupt threshold control register control, the setting
should be aligned with ITC bits at register USBCMD. should be aligned with ITC bits at register USBCMD.
- ahb-burst-config: it is vendor dependent, the required value should be
aligned with AHBBRST at SBUSCFG, the range is from 0x0 to 0x7. This
property is used to change AHB burst configuration, check the chipidea
spec for meaning of each value. If this property is not existed, it
will use the reset value.
Example: Example:
...@@ -44,4 +49,6 @@ Example: ...@@ -44,4 +49,6 @@ Example:
phy-names = "usb-phy"; phy-names = "usb-phy";
vbus-supply = <&reg_usb0_vbus>; vbus-supply = <&reg_usb0_vbus>;
gadget-itc-setting = <0x4>; /* 4 micro-frames */ gadget-itc-setting = <0x4>; /* 4 micro-frames */
/* Incremental burst of unspecified length */
ahb-burst-config = <0x0>;
}; };
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